Thermal treatment of moroccan phosphogypsum

Issiouy, S. El; Atbir, Ali; Mançour-Billah, S.; Bellajrou, R.; Boukbir, L.; Hadek, M. El

doi:10.1051/matecconf/20130301030

Cited by 18 publications

(4 citation statements)

References 11 publications

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“…The major constituents of phosphogypsum are similar to those of FGD gypsum, but contain more impurities such as SiO 2 , free H 3 PO 4 , phosphates, and organic matter [30]. The sulfur content of FGD gypsum and phosphogypsum was 12.54-22.39 wt% and 12.40-22.80 wt%, respectively, showing similar ranges.…”

Section: Characterization Of Waste Gypsummentioning

confidence: 81%

Recycling of Industrial Waste Gypsum Using Mineral Carbonation

Kang

2022

Sustainability

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Direct mineral carbonation (MC) is used to mitigate carbon dioxide (CO2) emissions. This method has the great advantages of reducing the amount of industrial residues and creating valuable materials by incorporating CO2. Waste gypsum, industrial waste including flue gas desulfurization (FGD) gypsum (25.27–53.40 wt% of CaO), and phosphogypsum (30.50–39.06 wt% of CaO) can be used for direct MC (conversion rate up to 96%). Mineral carbonation converts waste gypsum into calcium carbonate (CaCO3), which can be recycled during desulfurization. Furthermore, ammonium sulfate ((NH4)2SO4), which is used as a fertilizer, can be prepared as a by-product when the carbonation reaction is performed using ammonia (NH3) as a base. In this study, recent progress in the carbonation kinetics and preparation of CaCO3 using FGD gypsum and phosphogypsum with NH3 was investigated. Temperature, CO2 partial pressure, CO2 flow rate, and NH3 concentration were reviewed as factors affecting carbonation kinetics and efficiency. The factors influencing the polymorphs of the prepared CaCO3 were also reviewed and summarized. A state-of-the-art bench-scale plant study was also proposed. In addition, economic feasibility was investigated based on a bench-scale study to analyze the future applicability of this technology.

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Section: Characterization Of Waste Gypsummentioning

confidence: 81%

Recycling of Industrial Waste Gypsum Using Mineral Carbonation

Kang

2022

Sustainability

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“…According to other data, Morocco is the first world exporter of phosphate and the third producer with a production of 30 million tons per year [77]. The problem of PG landfills is also vital in Jordan and Tunisia [67].…”

Section: Phosphogypsummentioning

confidence: 99%

“…Jordan 40 [78] In total (i.e., the total amount in the deposits by the year of estimation) 60 [79] In total Morocco 15 [80] Annually (i.e., the annual amount of produced phosphogypsum) 30 [77] annually Tunisia 10 [78,81] annually More than 12 [82] need to be correctly managed and stored…”

Section: Source Additional Notesmentioning

confidence: 99%

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Trends and opportunities of using local sustainable building materials in the Middle East and North Africa region

Sonebi

Abdalqader²,

Amziane³

et al. 2022

RILEM Tech Lett

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In recent decades, most of construction activities have been taking place in developing countries such as the Middle East and North Africa region. The expansion in infrastructure has great impact in the technological, social, economic and environmental transformation of this region. Construction sector contribution to Gross Domestic Product (GDP) varies throughout the region and ranges between 2-10%. Currently, sustainable construction requires integrated and comprehensive sustainable design including careful choice of materials and methods. Materials that are locally available and require less energy to produce and transport would pave the way to more sustainable practices. Many countries in the region have realised the benefits of using local building materials on the economy, society and environment. This paper outlines the key trends and opportunities of using sustainable and affordable local building materials in the region to respond to the global climate change crisis and to promote more sustainable and environmentally friendly practices. The current practice of using various building materials such as bio-based materials, treated municipal solid waste incineration bottom ash (MSWI-BA), construction and demolition waste, gypsum-containing by-products (phosphorgypsum, FGD gypsum, borogypsum and others) and rammed earth will be reviewed. It is concluded that the use of these local building materials in construction activities would foster the development of the society. However, some of these materials are already developed and reached the implementation stage while most of them are still at R&D stage. Therefore, there is an urgent need for a comprehensive local and regional strategies to enhance the utilization of these materials.

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